Library of Congress. Copyright Office

Summary

Library of Congress. Copyright Office Supplementary Copyright Statutes…

Even if you conclude that a work is in the public domain in the United States, this does not necessarily mean that you are free to use it in other countries. Every nation has its own laws governing the length and scope of copyright protection, and these are applicable to uses of the work within that nation's borders. Thus, the expiration or loss of copyright protection in the United States may still leave the work fully protected against unauthorized use in other countries.
Source: Gutenberg

Library of Congress. Copyright Office Supplementary Copyright Statutes…

Thus, an owner of only an exclusive right would not be permitted to file an application in his or her own name as the copyright claimant, although he or she could submit an application. While the URAA authorizes the Office to adopt regulations permitting owners of restored copyrights to file for registration of the restored copyright, there is nothing in the URAA to suggest that parties who register a restored work are any different from those under existing copyright law and regulations. Moreover, it seems essential to retain the concept of claimant since authors may no longer be alive.
Source: Gutenberg

Library of Congress. Copyright Office Supplementary Copyright Statutes…

Use of the notice may be important because it informs the public that the work is protected by copyright, identifies the copyright owner, and shows the year of first publication. Furthermore, in the event that a work is infringed, if the work carries a proper notice, the court will not *give any weight to a defendant's interposition of an innocent infringement defense*—that is, that he or she did not realize that the work was protected. An innocent infringement defense may result in a reduction in damages that the copyright owner would otherwise receive.
Source: Gutenberg

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